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Bench Mark Sheet for 8668092, BATTERY CREEK SC

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  5

                                                                                
Station ID: 8668092                         PUBLICATION DATE:  02/05/2004
Name:       BATTERY CREEK                                     
            SC
NOAA Chart: 11516                           Latitude:   32° 24.8' N (  32.41330)
USGS Quad:  BEAUFORT                        Longitude:  80° 42.0' W ( -80.70000)


To reach the tidal bench marks from the intersection of U.S. Highway 21 and
State Highway 281 in Beaufort, proceed south on State Highway 281 for 2.9 km
(1.8 mi) to County Road S-7-159, then west on County Road S-7-159 for 0.72 km
(0.45 mi) to a sand drive, then west on the sand drive for 0.8 km (0.5 mi) to a
large, brick, L-shaped house.  The bench marks are along the drive leading to
the house and dock.  The tide gage and staff were located on the dock NE of the
house.


                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  8092 A 1978
                         DESIGNATION:          866 8092 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4451
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  CK2228
SETTING CLASSIFICATION:  Galvanized steel rod                  OPUS PID:        
LATITUDE:   32° 24.8' N (  32.41330)          LONGITUDE:  80° 42.0' W ( -80.70000)


The primary bench mark is a disk located on the north side of the trail that
leads to the dock, 14.63 m (48.0 ft) NW of a 0.21 m (0.7 ft) diameter twin oak
tree, 11.19 m (36.7 ft) WSW of a lone 0.3 m (1 ft) diameter palmetto tree, 5.18
m (17.0 ft) ESE of the dock, and 1.83 m (6.0 ft) NE of the centerline of the
trail leading to the dock.  The bench mark is set at ground level, crimped to
the top of a galvanized steel rod driven 11.6 m (38 ft) to refusal, and encased
in a 4-inch PVC pipe and concrete kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                                                
Station ID: 8668092                         PUBLICATION DATE:  02/05/2004
Name:       BATTERY CREEK                                     
            SC
NOAA Chart: 11516                           Latitude:   32° 24.8' N (  32.41330)
USGS Quad:  BEAUFORT                        Longitude:  80° 42.0' W ( -80.70000)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  8092 B 1978
                         DESIGNATION:          866 8092 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4452
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   32° 24.8' N (  32.41330)          LONGITUDE:  80° 42.0' W ( -80.70000)


The bench mark is a disk set in a concrete monument located on the dirt path
leading from the main house to the private dock, 29.26 m (96.0 ft) SW of bench
mark 8092 A 1978, 14 m (46 ft) SSW of a 0.21 m (0.7 ft) diameter twin oak tree,
5.18 m (17.0 ft) SE of a 0.46 m (1.5 ft) diameter live oak tree, 1.83 m (6.0 ft)
west of the centerline of the dirt path leading to the dock, and at ground
level.



                         BENCH MARK STAMPING:  8092 C 1978
                         DESIGNATION:          866 8092 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4453
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Galvanized steel rod                  OPUS PID:        
LATITUDE:   32° 24.8' N (  32.41330)          LONGITUDE:  80° 42.0' W ( -80.70000)


The bench mark is a disk located on the path leading from the main house to the
dock, 39.32 m (129.0 ft) SE of bench mark 8092 B 1978, 4.39 m (14.4 ft) north of
a 0.21 m (0.7 ft) diameter oak tree, 3.23 m (10.6 ft) ENE of the centerline of
the dirt path leading to the dock, and 1.83 m (6.0 ft) SSW of a 0.15 m (0.5 ft)
diameter pine tree.  The bench mark is set 9 cm (0.3 ft) above ground level,
crimped to the top of a galvanized steel rod driven 11.6 m (38 ft) to refusal,
and encased in a 4-inch PVC pipe and concrete kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                                                
Station ID: 8668092                         PUBLICATION DATE:  02/05/2004
Name:       BATTERY CREEK                                     
            SC
NOAA Chart: 11516                           Latitude:   32° 24.8' N (  32.41330)
USGS Quad:  BEAUFORT                        Longitude:  80° 42.0' W ( -80.70000)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  8092 D 1978
                         DESIGNATION:          866 8092 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4454
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  CK2227
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   32° 24.8' N (  32.41330)          LONGITUDE:  80° 42.0' W ( -80.70000)


The bench mark is a disk set in a concrete monument located on the right side of
the drive in the front of the house near a clump of cedar trees, 36.24 m (118.9
ft) NE of the corner of the house, 20.42 m (67.0 ft) NNW of a 0.61 m (2.0 ft)
diameter pine tree with a yard light, and 18.47 m (60.6 ft) NNE of the NE brick
pillar at the north edge of the parking area.



                         BENCH MARK STAMPING:  8092 E 1978
                         DESIGNATION:          866 8092 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4455
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Galvanized steel rod                  OPUS PID:        
LATITUDE:   32° 24.8' N (  32.41330)          LONGITUDE:  80° 42.0' W ( -80.70000)


The bench mark is a disk located near the main house and a small duck pond,
88.39 m (290.0 ft) NE of bench mark 8092 D 1978, 29.57 m (97.0 ft) SW of the
edge of the duck pond, 9.75 m (32.0 ft) west of the centerline of the drive,
9.57 m (31.4 ft) SE of a 0.61 m (2.0 ft) diameter triple oak tree, and 2.13 m
(7.0 ft) NE of the edge of the woods.  The bench mark is set at ground level,
crimped to the top of a galvanized steel rod driven 11.6 m (38 ft) to refusal,
and encased in a 4-inch PVC pipe and concrete kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                                                
Station ID: 8668092                         PUBLICATION DATE:  02/05/2004
Name:       BATTERY CREEK                                     
            SC
NOAA Chart: 11516                           Latitude:   32° 24.8' N (  32.41330)
USGS Quad:  BEAUFORT                        Longitude:  80° 42.0' W ( -80.70000)


                            T I D A L   D A T U M S 


Tidal datums at BATTERY CREEK based on:

     LENGTH OF SERIES:      1 YEAR
     TIME PERIOD:           March 1978 - February 1979
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8667999 BEAUFORT


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     HIGHEST OBSERVED WATER LEVEL (06/12/1979)         =  3.015
     MEAN HIGHER HIGH WATER                     MHHW   =  2.511
     MEAN HIGH WATER                            MHW    =  2.390
     North American Vertical Datum              NAVD88 =  1.361
     MEAN SEA LEVEL                             MSL    =  1.330
     MEAN TIDE LEVEL                            MTL    =  1.226
     MEAN LOW WATER                             MLW    =  0.061
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (03/10/1978)         = -0.575

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     8092 A 1978                                 3.847    1.457
     8092 B 1978                                 3.163    0.773
     8092 C 1978                                 4.835    2.445
     8092 D 1978                                 6.090    3.700
     8092 E 1978                                 5.287    2.897


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  5

                                                                                
Station ID: 8668092                         PUBLICATION DATE:  02/05/2004
Name:       BATTERY CREEK                                     
            SC
NOAA Chart: 11516                           Latitude:   32° 24.8' N (  32.41330)
USGS Quad:  BEAUFORT                        Longitude:  80° 42.0' W ( -80.70000)


                             D E F I N I T I O N S


Mean Sea Level (MSL) is a tidal datum determined over a 19-year National Tidal
Datum Epoch.  It pertains to local mean sea level and should not be confused
with the fixed datums of North American Vertical Datum of 1988 (NAVD88).

NAVD88 is a fixed datum derived from a simultaneous, least squares, minimum
constraint adjustment of Canadian/Mexican/United States leveling observations.
Local mean sea level observed at Father Point/Rimouski, Canada was held fixed as
the single initial constraint.  NAVD88 replaces NGVD29 as the national
standard geodetic reference for heights.  Bench mark elevations relative to
NAVD88 are available from NGS through the World Wide Web at 
National Geodetic Survey.

NGVD29 is a fixed datum adopted as a national standard geodetic reference for
heights but is now considered superseded.  NGVD29 is sometimes referred to as
Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological
Survey Topographic Quads.  NGVD29 was originally derived from a general
adjustment of the first-order leveling networks of the U.S. and Canada after
holding mean sea level observed at 26 long term tide stations as fixed.
Numerous local and wide-spread adjustments have been made since establishment in
1929.  Bench mark elevations relative to NGVD29 are available from the National
Geodetic Survey (NGS) data base via the World Wide Web at 
National Geodetic Survey.

NAVD88 and NGVD29 are fixed geodetic datums whose elevation relationships to
local MSL and other tidal datums may not be consistent from one location to
another.

The Vertical Mark Number (VM#) and PID# shown on the bench mark sheet are unique
identifiers for bench marks in the tidal and geodetic databases, respectively.
Each bench mark in either database has a single, unique VM# and/or PID# assigned.
Where both VM# and PID# are indicated, both tidal and geodetic elevations are
available for the bench mark listed. The NGS's Integrated Data Base (IDB PID)
provides geodetic datum based on traditionally leveled and bluebooked ties to
the National Spatial Reference System(NSRS) https://www.ngs.noaa.gov/datasheets/.
The NGS Online Positioning User Service (OPUS PID) provides geodetic datum based
on GPS position & tie it to the NSRS https://www.ngs.noaa.gov/OPUS/.

The NAVD88 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have NAVD88 elevations.
The NAVD88 elevation relationship shown in the table is derived from an average
of several bench mark elevations relative to tide station datum.  As a result of
this averaging, NAVD88 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from NAVD88 elevations listed for
each bench mark in the NGS database.

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Revised: 08/08/2018
NOAA / National Ocean Service
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